Yield parameters of old and young lucerne plants upon pre-sowing electromagnetic seed stimulation
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| Authors: | Marek Ćwintal1, Agata Dziwulska-Hunek2, Agnieszka Sujak2 1Department of Agrometeorology, University of Life Sciences ul. Akademicka 15, 20-950 Lublin, Poland 2Department of Physics, University of Life Sciences, ul. Akademicka 13, 20-950 Lublin, Poland |
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| Abstract : | Lucerne is a fodder perennial plant from the Fabaceae family grown under field conditions as feed for various groups of animals. This paper is concerned with the effect of electromagnetic stimulation of lucerne seed on the yield, yield parameters, and content of photosynthetic pigments in 1-2- and 5-6- year old lucerne plants. In 2012-2013 a field experiment was conducted with 5-6-year old lucerne, which was initiated in 2008. Another experiment was started in 2012 and conducted on 1-2-year old lucerne. The research material were seeds of hybrid lucerne (Medicago x varia T. Martyn) variety Radius and sowing lucerne (Medicago sativa L.) variety Ulstar. Before sowing the seeds were stimulated with the following combinations of physical factors: C – control (untreated sample), L – laser light with a surface power density of 6 mW cm–2 during 3-fold free fall, F – alternating magnetic field with an induction of 30 mT and exposure time of 30 s; L + F – laser light and magnetic field in the above doses. Electromagnetic stimulation contributed significantly to an increase in the number of shoots per 1 m2as compared to the control. No significant difference in the weight of a single shoot was observed between the experimental combinations. 5-6-year old lucerne was characterised by a statistically greater shoot mass as compared with 1-2-year old plants. Statistical analysis showed that the highest yield increase was observed for the samples where seeds were stimulated with laser light and both laser light and magnetic field, relative to the control. The best results concerning concentrations of chlorophyll a and b and carotenoids were observed for alternating magnetic field, where the increase amounted to 9, 11 and 13.0%, respectively, as compared to the control. |
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| Keywords : | lucerne, crop, photosynthetic pigments, electromagnetic stimulation, field experiment | ||||||||
| Language : | english | ||||||||